What do I deliver?

A Dropbox download link to four database tables, each of which has a CSV file and a
postgres dump file.
So, 8 data files in total: 4 CSV files & 4 postgres dump files.
I also include a simple script for you to restore postgres data.

Refresh data any time you want for 3 months, for free.

Afterwards, $100 to refresh data any time you want for every 3 months.
Of course, if you don't need the most updated data, then you don't pay this $100.
If I raise price after you purchase the data, you can still pay the earlier price.

For example: You pay $1000 on March 9, 2017.
I email you a download link within 12 hours.
On April 10, 2017, you request for the most updated data.
I email you a download link within 12 hours, for free.
On Oct 21, 2017, you pay $100 and request for the most updated data.
I email you a download link within 12 hours.